randall



(No Model.)

S. H. RANDALL.

LEATHER TRIMMING MACHINE Patented Mar. 27, 1888.

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UNITED STATES PATENT FFlCE.

SILAS H. RANDALL, OF WYOMING, OHIO, ASSIGNOR OF ONE-HALF TO JAMES D. RANDALL, OF SAME PLACE.

LEATHER-TRlMMlNG MACHINE.

SPECIFICATION forming part of Letters Patent No. 380,296, dated March 27, 1888.

Application filed February 6, 1888. Serial No. 263,116. (No model.)

To aZZ whom, it may concern:

Be it known that I, SILAS H. RANDALL, a citizen of the United States of America, residing at Wyoming, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Strap-Trimmers, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention comprises a specific construction of those machines which are employed for 7 simultaneously trimming the opposite edges of a trace or other similar strap, the details of said machine being hereinafter more fully described, and pointed out in the claim.

In the annexed drawings, Figure 1 is a vertical section of my improved machine in condition for receiving a strap, said section being taken at the line Z Z of Fig. 2. Fig. 2 is a plan of the machine, the resser-feet being shown in their normal or depressed position. Fig. 3 is a front elevation of the machine, the feet being in the same position as in the preceding illustration. Fig. 4 is a side elevation ofone of the levers detached from its slide or carriage. Fig. 5 is a side elevation of said carriage detached from the machine. Fig. 6 is a sectionized plan of a carriage. Fig. 7 is an enlarged horizontal section showing the knives in the act of trimming the edges of a strap.

A. represents the frame or bed-plate of the machine, which frame has suitable provision for attachment to a bench or table, B. (Seen in Fig. 1.)

O 0 represent a pair of parallel guides running longitudinally of the frame, the front guide, 0, having a chanifered edge, 0, for a purpose that will presently appear. Adapted to be adjusted along these guides is a pair of precisely-similar slides or carriages, consisting of side plates, D D E E, extending above and below said guides and united. at bottom by webs d e.

d and c are extensions at the front ends of the plates D E, to which extensions the knives F F are attached by screws or bolts f f.

The slides are retained in position by screws G G, tapped into the webs d e, the points of said screws bearing against the chamfered edge 0 of guide 0, and the screw G being preferably provided with a small hand-wheel, g, because the slide D is the one that is the most frequently shifted. Pivoted within these side plates, D D E E, as at H H, are swinging levers I J, the front ends of which are bent inwardly at t j, and then carried down at i j, which downward prolongations form the presserfeet of the machine. Furthermore, each lever has a segmental cylindrical flange, i j", concentric with the pivots H H, which flanges have thongs, chains, or wire cords K L attached thereto.

The thong K is secured to the front of said flanges, and the bend ofi said thong carries a weight or spring capable of causing the feet 2" j to bear firmly upon the strap 1?. In Fig. 1 this thong is shown coupled to the free end of a spring, M, the other end thereof being suitably secured to the frame of bench B. Thong L is secured to the rear of flanges ij, and its bend is coupled to a treadle, N. O O are stops of these flanges, which stops bear against the rear side of guide 0, and thus limit the opening of levers I J. '(See Fig. 1.)

This machine is operated in the following manner: Slide E E is first screwed very firmly to the frame and near the right end of guides O C, after which act the other slide, D D, is adjusted to the required width of strap and retained in position by the screw G, the stress of spring M serving to keep the presser-feet 'i in contact with the upper surface of guide 0, as seen in Fig. 3. Treadle N is then depressed, thereby overcoming the stress of said spring and causing the levers I J to swing up until their respective stops 0 0 come in contact with the rear ,side of guide C. Ample room is now aflorded for the insertion of the strap P between the opposing faces of slides D E, as seen in Fig. 7. Treadle N is then released, so as to swing down the levers I J and cause their respective feet j to bear upon the opposite edges of the strap at a point very near the cutting-edges of the knives F F. The strap is then drawn forward in the direction of the arrow, the pressure of feet i" j preventing any wrinkling or buckling of the leather, while the knives trim off the edges of the strap in the usual manner.

The above is a description of the preferred form of my machine; but in some cases either of the levers I or J may be pivoted to a fixture of the frame, instead of being hung upon a slide or carriage, as one shiftable carriage will afford a sufficient range of adjustment for all ordinary purposes.

I claim as my invention An improved strap-trimmer, consisting of the frame or bed-plate A,.guides O C, and

[0 slides D D d d E E e e, carrying the knives F F, and swinging levers I i i i J j j j, said slides being secured in place by set-screws G G, all combined as herein described.

In testimony whereof I afiix my signature in presence of two witnesses.

SILAS H. RANDALL.

Witnesses:

JAMES H. LAYMAN, SAMLS. CARPENTER. 

